Materials Science & Engineering
What is Materials Science & Engineering?
Is an interndisciplinary field that studies and manipulates the composition and structure of materials across length scales to control materials properties
The study of thermodynamics properties
The study of Macroscopic structures of Materials
The study of chemical properties of Materials.
What is the meaning of structure?
Chemical make-up of a material
It describe macroestructural arrangements.
Describes how many elements are in a object.
Description of the arrangement of atoms, as seen at different levels of detail.
What is the meaning in synthesis ?
How materials are shaped into useful components to cause changes in the properties of different materials.
Process through which chemical properties can be change
How materials are made from naturally occurring or man-made chemicals.
The study of microscopic structures
If you bend a piece of cooper wire which of the following statements is true?
Eventually, the pure copper wire becomes so hard and brittle that it will break!
The electrical resistivity of the wire will increase
The internal structure changes
All of the above
What is the meaning of processing in Materials Science?
How materials are shaped into useful components to cause changes in the properties of different materials.
Process through which chemical properties can be change
How materials are made from naturally occurring or man-made chemicals.
Which cares to take when handleling materials.
Which are the groups in which materials are divided?
Metals and Alloys , Plastics, Concretes, Conductive-Glasses
Polymers, Ceramic-Glasses, Magnetics, No Magnetics, Semiconductors
Metal and Alloys, Ceramic-Glasses, Polymers, Semiconductors, Composites
Non Ferrous , Conductive, Thermal-stable, Polymers
What is the meaning of Stress in Material Science?
Load or force per unit area.
Elongation or change in dimension divided by the original dimension.
Continuous force applied in intervals of time over an specific area.
None of the above.
What is the meaning of Strain in Material Science?
Continuous force applied in intervals of time over an specific area.
Elongation or change in dimension divided by the original dimension.
Young´s Module
Load or force per unit area.
When does a deformation is elastic?
If the strain goes away after the load or applied stress is removed
If the strain remains after the stress is removed
When does a deformation is plastic?
If the strain goes away after the load or applied stress is removed
If the strain remains after the stress is removed
Metal properties
*Level of conductivity can be changed.
*Can be tempered to make them stronger *Are usually processed by Melting and Casting.
*Typically organic materials. *Good Electrical & Thermal insulation *Good strength to wiegth ratio *Not suitables for high temperatures *Good resistance to corrosive chemicals
*Do not conduct heat well *Electrical Insulation *Strong & Hard *Brittle *Exceptional strength under compression
*Formed from two or more materials *Properties not found in any single material.
*Good electrical and thermal conductivity *High strength *High stiffness *ductility *shock resistance
Ceramic properties
*Level of conductivity can be changed.
*Can be tempered to make them stronger *Are usually processed by Melting and Casting.
*Typically organic materials. *Good Electrical & Thermal insulation *Good strength to wiegth ratio *Not suitables for high temperatures *Good resistance to corrosive chemicals
*Do not conduct heat well *Electrical Insulation *Strong & Hard *Brittle *Exceptional strength under compression
*Formed from two or more materials *Properties not found in any single material.
*Good electrical and thermal conductivity *High strength *High stiffness *ductility *shock resistance
Glasses properties
*Level of conductivity can be changed.
*Can be tempered to make them stronger *Are usually processed by Melting and Casting.
*Typically organic materials. *Good Electrical & Thermal insulation *Good strength to wiegth ratio *Not suitables for high temperatures *Good resistance to corrosive chemicals
*Do not conduct heat well *Electrical Insulation *Strong & Hard *Brittle *Exceptional strength under compression
*Formed from two or more materials *Properties not found in any single material.
*Good electrical and thermal conductivity *High strength *High stiffness *ductility *shock resistance
Polymers properties
*Level of conductivity can be changed.
*Can be tempered to make them stronger *Are usually processed by Melting and Casting.
*Typically organic materials. *Good Electrical & Thermal insulation *Good strength to wiegth ratio *Not suitables for high temperatures *Good resistance to corrosive chemicals
*Do not conduct heat well *Electrical Insulation *Strong & Hard *Brittle *Exceptional strength under compression
*Formed from two or more materials *Properties not found in any single material.
*Good electrical and thermal conductivity *High strength *High stiffness *ductility *shock resistance
Semiconductors properties
*Level of conductivity can be changed.
*Can be tempered to make them stronger *Are usually processed by Melting and Casting.
*Typically organic materials. *Good Electrical & Thermal insulation *Good strength to wiegth ratio *Not suitables for high temperatures *Good resistance to corrosive chemicals
*Do not conduct heat well *Electrical Insulation *Strong & Hard *Brittle *Exceptional strength under compression
*Formed from two or more materials *Properties not found in any single material.
*Good electrical and thermal conductivity *High strength *High stiffness *ductility *shock resistance
Composite properties
*Level of conductivity can be changed.
*Can be tempered to make them stronger *Are usually processed by Melting and Casting.
*Typically organic materials. *Good Electrical & Thermal insulation *Good strength to wiegth ratio *Not suitables for high temperatures *Good resistance to corrosive chemicals
*Do not conduct heat well *Electrical Insulation *Strong & Hard *Brittle *Exceptional strength under compression
*Formed from two or more materials *Properties not found in any single material.
*Good electrical and thermal conductivity *High strength *High stiffness *ductility *shock resistance
Is the level of stress needed to initiate plastic deformation ?
Young´s Module
Yield Strength
Elongation Coeficient
Strain Module
What does it mean ductility?
Is a solid material's ability to deform under tensile stress.
The maximum percent deformation that can be achieved
Material's ability to be stretched into a wire.
All of the above
Functional Classification of Materials ?
Structural, Aerospace, Biomedical, Electronic Materials, Energy technology and Enviromental, Magnetic Materials, Optical Materials, Smart Materials
Construction, Oceanic, Aerospace, Conductive , High Temperature
The structure-property relationships in materials fabricated into components are often influenced by ?
Temperature ,Electrical ,Ambient, Mechanical
Temperature, Corrosion, Fatigue , Strain rate
What are crystalline Materials?
A material composed of one or many crystals. In each crystal, atoms or ions show a long-range periodic arrangement.
The arrangement of the material’s atoms does not have long-range order
What are amorphous Materials?
A material composed of one or many crystals. In each crystal, atoms or ions show a long-range periodic arrangement.
The arrangement of the material’s atoms does not have long-range order
Mechanical Properties ?
Properties of a material, such as strength, that describe how well a material withstands applied forces, including tensile or compressive forces, impact forces, cyclical or fatigue forces, or forces at high temperatures.
Characteristics such as color, elasticity, electrical or thermal conductivity, magnetism, and optical behavior that generally are not significantly influenced by forces acting on a material.
Physical properties ?
Characteristics such as color, elasticity, electrical or thermal conductivity, magnetism, and optical behavior that generally are not significantly influenced by forces acting on a material.
Properties of a material, such as strength, that describe how well a material withstands applied forces, including tensile or compressive forces, impact forces, cyclical or fatigue forces, or forces at high temperatures.
Which of the following sentences is true for "Strength to weight ratio"?
The strength of a material divided by its density
Materials with a high strength-to-weight ratio are strong but lightweight.
Carbon-epoxy composite has the higher Strength to weight ratio of all materials.
All of the above.
Which are the levels in which material structures can be characterized?
Megastructures, Metastructures, Picostructures, Microstructures
Atomic Structure; short- and long-range atomic arragements, nanostructure, microstructure, macrostructure.
Subatomic Structure, Consecutive Structure, Nuclear Structure, Macrostructure.
Atomic Structure?
Is the structure of a material at a length scaleof 1 to 100 nm.
Is the structure of materials at a length scale of 100 to 100,000 nm or 0.1 to 100 micrometers (often written as m and pronounced as “microns”) , The microstructure typically refers to features such as the grain size of a crystalline material and others related to defects in materials.
The atoms or ions show a particular order only over relatively short distances (1 to 10 Å) , order is in the form of atoms or ions arranged in a three-dimensional pattern that repeats over much larger distances (from 10 nm to cm).
Is the structure of a material at a macroscopic level where the length scale is 100m. Features that constitute macrostructure include porosity, surface coatings, and internal and external microcracks.
The nucleus consisting of protons and neutrons and the electrons surrounding the nucleus ; It affects the types of bonds that hold materials together.
Short- and long-range atomic arrangements;
Is the structure of a material at a length scaleof 1 to 100 nm.
Is the structure of materials at a length scale of 100 to 100,000 nm or 0.1 to 100 micrometers (often written as m and pronounced as “microns”) , The microstructure typically refers to features such as the grain size of a crystalline material and others related to defects in materials.
The atoms or ions show a particular order only over relatively short distances (1 to 10 Å) , order is in the form of atoms or ions arranged in a three-dimensional pattern that repeats over much larger distances (from 10 nm to cm).
Is the structure of a material at a macroscopic level where the length scale is 100m. Features that constitute macrostructure include porosity, surface coatings, and internal and external microcracks.
The nucleus consisting of protons and neutrons and the electrons surrounding the nucleus ; It affects the types of bonds that hold materials together.
Nanostructure ?
Is the structure of a material at a length scaleof 1 to 100 nm.
Is the structure of materials at a length scale of 100 to 100,000 nm or 0.1 to 100 micrometers (often written as m and pronounced as “microns”) , The microstructure typically refers to features such as the grain size of a crystalline material and others related to defects in materials.
The atoms or ions show a particular order only over relatively short distances (1 to 10 Å) , order is in the form of atoms or ions arranged in a three-dimensional pattern that repeats over much larger distances (from 10 nm to cm).
Is the structure of a material at a macroscopic level where the length scale is 100m. Features that constitute macrostructure include porosity, surface coatings, and internal and external microcracks.
The nucleus consisting of protons and neutrons and the electrons surrounding the nucleus ; It affects the types of bonds that hold materials together.
Microstructure?
Is the structure of a material at a length scaleof 1 to 100 nm.
Is the structure of materials at a length scale of 100 to 100,000 nm or 0.1 to 100 micrometers (often written as m and pronounced as “microns”) , The microstructure typically refers to features such as the grain size of a crystalline material and others related to defects in materials.
The atoms or ions show a particular order only over relatively short distances (1 to 10 Å) , order is in the form of atoms or ions arranged in a three-dimensional pattern that repeats over much larger distances (from 10 nm to cm).
Is the structure of a material at a macroscopic level where the length scale is 100m. Features that constitute macrostructure include porosity, surface coatings, and internal and external microcracks.
The nucleus consisting of protons and neutrons and the electrons surrounding the nucleus ; It affects the types of bonds that hold materials together.
Macrostructure?
Is the structure of a material at a length scaleof 1 to 100 nm.
Is the structure of materials at a length scale of 100 to 100,000 nm or 0.1 to 100 micrometers (often written as m and pronounced as “microns”) , The microstructure typically refers to features such as the grain size of a crystalline material and others related to defects in materials.
The atoms or ions show a particular order only over relatively short distances (1 to 10 Å) , order is in the form of atoms or ions arranged in a three-dimensional pattern that repeats over much larger distances (from 10 nm to cm).
Is the structure of a material at a macroscopic level where the length scale is 100m. Features that constitute macrostructure include porosity, surface coatings, and internal and external microcracks.
The nucleus consisting of protons and neutrons and the electrons surrounding the nucleus ; It affects the types of bonds that hold materials together.
Atomic Number?
Equal to the number of protons in each atom.
The total mass of the average number of protons and neutrons in the atom. (gr/mol)
Is the number of atoms or molecules in a mole. (molecules/mol)
Atomic Mass?
Equal to the number of protons in each atom.
The total mass of the average number of protons and neutrons in the atom. (gr/mol)
Is the number of atoms or molecules in a mole. (molecules/mol)
Avogadro number?
Equal to the number of protons in each atom.
The total mass of the average number of protons and neutrons in the atom. (gr/mol)
Is the number of atoms or molecules in a mole. (molecules/mol)
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